> The newspapers make that mistake now and then when writing> about former president 'Harry S Truman'. His middle name, in fact, was> merely the initial /S/ and there shouldn't be a period after a complete> name. There were many conjectures over the years about what the 'S' stood> for in his name. His wife Bess and his daughter Margaruite both confirmed> it meant nothing at all. Just 'S'. PAT]

Scholarly works have been written on this subject. Harry S (or S.)
Truman often signed documents without the period, also signed many with the
period.